I understand your frustration, but we should keep certain things in proper perspective.
Firstly, unless you were born in America, going there is simply a privilege/opportunity, and not a right. You know that no other country in the world gives you such an opportunity. So the Americans will determine who comes in and who stays out.
To maintain the integrity of the program and its continuation, they have to do "administrative processing" to stop fraud [fake identity and certificates]and to stop possible terrorists. This can take time. You agree that in the interest of public safety, the US govt. needs to stop terrorists from entering the coutry at all costs. If the terrorists strike, they will kill everybody-black, white, chinese, indian- not only Americans. Many foreigners died on (9/11).
The Embassy needs to show the American people that it is doing all it can, in oder to stop fraud and terrorists, because there are many powerful people in America asking for cancellation of the DV lottery because of fears of fraud and terrorists.
We therefore have 2 options- "administrative processing" or cancel the DV.
Lastly, Cameroon will always remain eligible, since you don't send many immigrants to America. You have to send 10,000 per year for 5 consecutive years before you are dropped.
Cheer up.